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02 kA. ) Figure 2-14—Distribution of instantaneous currents for fault on capacitor feeder in sample system Example B: Calculate the phase-to-ground fault on the primary of 69 kV Transformer T-1. Figure 2-16 shows the phase-to-ground-fault current (3I0) at the receiving end of tie line #1 (at Bus 1). The long-time fault current of 5468 A flows exclusively from the utility source because both transformers in the plant have delta-connected primary windings. Example C: Calculate the phase-to-ground fault at the secondary of Transformer T-5.

O. org/). 44 Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEE No reproduction or networking permitted without license from IHS Copyright © 2001 IEEE. All rights reserved. 5-1979, IEEE Guide for Calculation of Fault Currents for Application of AC High-Voltage Circuit Breakers Rated on a Total Current Basis. 12 Bibliography The following publications may provide information of interest to readers wishing to pursue the subject of this chapter in further detail.

Figure 2-16—Phase-to-ground fault on high-voltage bushings of Transformer T-1 evaluating faults at points other than buses can be difficult. For these reasons, protection engineers have developed additional computer methods that more realistically simulate exact real-world conditions. 42 Copyright © 2001 IEEE. All rights reserved. --``,-`-`,,`,,`,`,,`--- Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEE No reproduction or networking permitted without license from IHS Not for Resale IEEE Std 242-2001 SHORT-CIRCUIT CALCULATIONS --``,-`-`,,`,,`,`,,`--- NOTE—Because this transformer is connected delta-delta, the zero-sequence network is open circuited.

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A field approach to the description of gravitational interaction


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